The ShapeShift Backpack Carry Expansion Pack is the ultimate addition to transform any ShapeShift holster into on-the-go gun security for hunting, hiking or any outdoor activity. The design of the ShapeShift Backpack Carry Expansion Pack works perfectly with backpack straps, and is also compatible with other straps on duffle bags, range bags, and more. This expansion pack focuses on keeping your firearm tightly secured and conveniently placed. The tactical clamp wraps around the backpack strap, and locks into place. The clamp is backed with a ridged polymer, which works with the texture of the strap and prevents your holstered firearm from sliding around. Once combined with the Shift Shell, the expansion pack makes a premier holster you can depend on. *Note- This expansion pack is not a full holster; it requires a Shift Shell in order to operate.